Label lbl = new Label();
                foreach (Type t in yourAssembly.GetTypes())
                {
                    if (t.IsSubclassOf(typeof(Form)))
                    {
                        TreeNode addedForm = treeView1.Nodes.Add(t.Name);
                        foreach (FieldInfo field in t.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance))
                        {
                            //if (field.FieldType.IsAssignableFrom(typeof(Label)))
                            if ( field.FieldType.IsSubclassOf(typeof(Control)))
                            {
                                if (field.FieldType.IsAssignableFrom(typeof(Label)))
                                {
                                    System.Diagnostics.Debug.Print(field.FieldType.Name);
                                    PropertyInfo prop = field.FieldType.GetProperty("Text");
                                    if (prop != null)
                                    {
                                        string valore = (string)prop.GetValue(lbl, null);
                                    }
                                }

///...